Automobile jack



Patented Sept. 19, 1933 1 [Wi -6 f Michael J. Deutsch, st. Paul, Minn.

Application November 13, 1931 Serial No. 574,688

2 Claims. (01. 254-86) My invention relates to lifting jacks of the type adapted for raising one or more wheels of an automobile and generally known as autojacks.

The main object of this invention is to provide simple and highly efficient jack means mounted on a car in proximity to all of its ground wheels and ready to be used with a minimum of efiort and little or no inconvenience. The improvement lies mainly in the means used for placing a jack in operative position to raise any one of the four wheels of a car nearest to which it is mounted, the actual raising means involving mechanism not claimed herein to be new in itself.

In the accompanying drawin r i Fig. 1 is a front view of the lower part of an automobile and a pair of my jack devices mounted on its front axle, one of said jacks being lowered for use.

Fig. 2 is a rear elevation of an automobile rear axle showing one ground wheel, the adjacent drive axle housing and position. I

Fig. 3 is an enlarged detail front view of a jack, a portion of an axle, and the upper housing of my device'in section to reveal a desired type of manipulated mechanism. 7 f

Fig. 4 is an enlarged right hand edge view of Fig. 3 showing further details of the mechanism in the upper housing and mounting means of said housing for the usual front axle of an auto.

Fig. 5 is a side view of the type of adjusting crank bar used with my devices.

Referring to the drawing by reference numerals, SR and GL designate respectively theright and left front wheels of an auto and of which 7 are the brake drums, 8 the spindle bolt; 9 the usually downwardly ofiset front axle. 10 are the parallel main frame channels, 11 the fenders and 12 the radiator, the last shown dotted only in Fig. 1. 13 is the rear axle housing of which 14 is the differential housing, the-rear-right wheel being shown and designated as 15 and having the brake drum 16. I 1

My device comprises a mechanism housing 17 2 adapted to be bolted as at 18 with a plate 19, to

a front axle 9 (see Fig. 4) or by a suitable clamp collar 20 (see Fig. 2) "for rigidly mounting it on a rear axle. As shown, my devices are preferably secured to the axles, one near each ground wheel, but it may be in some instances preferable to mount them on the main frame or some other rigid part of the auto which will raise an adjacent wheel when the jack is extended. I have one of my jacks in raised shown a screw-bar or threaded bar type of jack embodying a base and upright part 21 and a threaded bar 22 extending upwardly through its center. the upper end of said bar swiveled at 23 in a head 24. The screw bar is extended up- 'wardly. by interior gear means in the base of 21 rotated by the end part 2513., a crank-bar 25 insertible in a socket 26, the crank-bar being preferably of square bar stockandv to fit in Said socket. 24F is an integral upward extension 015* head 24 preferably of round shape and toothed asat 24T on about one-third of its perimeter, the said part 24P being rigidly fixed on a horl- 1 zontal pin 24F journaled in lower part of hous-. 0;

27 is an upper shaft parallel to pin 24P' and carrying a pinion 27P normally in mesh with the teeth 24Tof plate 24P,s'aid-shaft being slidably journaled at 28 in the upperfront and rear walls of housing 17 and the pinion being impelled forentire jack is forcibly raised from vertical tohorizontal position and parallel to the axle; as indicated by arrow 31 in Fig. 1; The jack will be heldin any angular position, or horizontal, by the catch 30. To lower a jack, the operator merely inserts end 2513 of bar 25 in socket 278 and exerts an inward push, thus disengaging pinion 27F and the teeth 24.1" of plate 24F being thus disengaged, allow the jack to drop. down. Releasing the push on bar 25 spring 29.cause s pinion 27F to slide forward and engage the teeth'- 27T-and the jack may be swung upwardly. Obviously, before the jack is, raised to horizontal. it must be shortened to allow its the ground or surface 32. v

I have now herein described andjillustrated in the accompanying drawing, desired means for I manipulating the jack from raised to lowered positions or vice-versa. Other equivalent means {65' maybe used and otherntypes of jacks may be used, for example, ratchet type jacksin which lever means are used to elongate the jack and raise a wheel. However, that type of jack using a long crank bar 25 as described, is preferred, 11:0

The 'forward part of l v base to clear '9 the same bar 25 being used to swing the jack and comprising a pinion slid-ably journaled in the housing and normally meshing with said toothed segment, the hub of said pinion provided with a socket for engagement by a crank to turn the pinion and raise or lower the jack as set forth. p

2. The structure specified in claim 1, and a compressioni coil spring normally pressing the pinion .in'to meshing position with "the toothed segment and adapted to yield under pressure to disengage thepinion; for the purpose set forth;

MICHAEL J. DEUTSCHQ 

